Doodle3D-Slicer/three.js-master/examples/js/exporters/OBJExporter.js
2015-06-12 15:58:26 +02:00

107 lines
2.1 KiB
JavaScript
Executable File

/**
* @author mrdoob / http://mrdoob.com/
*/
THREE.OBJExporter = function () {};
THREE.OBJExporter.prototype = {
constructor: THREE.OBJExporter,
parse: function ( object ) {
var output = '';
var indexVertex = 0;
var indexVertexUvs = 0
var indexNormals = 0;
var parseObject = function ( child ) {
var nbVertex = 0;
var nbVertexUvs = 0;
var nbNormals = 0;
var geometry = child.geometry;
if ( geometry instanceof THREE.Geometry ) {
output += 'o ' + child.name + '\n';
for ( var i = 0, l = geometry.vertices.length; i < l; i ++ ) {
var vertex = geometry.vertices[ i ].clone();
vertex.applyMatrix4( child.matrixWorld );
output += 'v ' + vertex.x + ' ' + vertex.y + ' ' + vertex.z + '\n';
nbVertex ++;
}
// uvs
for ( var i = 0, l = geometry.faceVertexUvs[ 0 ].length; i < l; i ++ ) {
var vertexUvs = geometry.faceVertexUvs[ 0 ][ i ];
for ( var j = 0; j < vertexUvs.length; j ++ ) {
var uv = vertexUvs[ j ];
vertex.applyMatrix4( child.matrixWorld );
output += 'vt ' + uv.x + ' ' + uv.y + '\n';
nbVertexUvs ++;
}
}
// normals
for ( var i = 0, l = geometry.faces.length; i < l; i ++ ) {
var normals = geometry.faces[ i ].vertexNormals;
for ( var j = 0; j < normals.length; j ++ ) {
var normal = normals[ j ];
output += 'vn ' + normal.x + ' ' + normal.y + ' ' + normal.z + '\n';
nbNormals ++;
}
}
// faces
for ( var i = 0, j = 1, l = geometry.faces.length; i < l; i ++, j += 3 ) {
var face = geometry.faces[ i ];
output += 'f ';
output += ( indexVertex + face.a + 1 ) + '/' + ( indexVertexUvs + j ) + '/' + ( indexNormals + j ) + ' ';
output += ( indexVertex + face.b + 1 ) + '/' + ( indexVertexUvs + j + 1 ) + '/' + ( indexNormals + j + 1 ) + ' ';
output += ( indexVertex + face.c + 1 ) + '/' + ( indexVertexUvs + j + 2 ) + '/' + ( indexNormals + j + 2 ) + '\n';
}
}
// update index
indexVertex += nbVertex;
indexVertexUvs += nbVertexUvs;
indexNormals += nbNormals;
};
object.traverse( parseObject );
return output;
}
};